Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..668w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. 668-672. Research supported by Pennsylvania State Un
Astronomy and Astrophysics
Astronomy
Accretion Disks, Radiative Heat Transfer, Stellar Mass Accretion, X Ray Binaries, Black Holes (Astronomy), Compton Effect, Cygnus Constellation, Neutron Stars, Optical Thickness, Shear Stress
Scientific paper
The effects of radiation shear stresses acting in accretion disks and boundary layers are considered. It is demonstrated that these stresses are dynamically unimportant for nonrelativistic flows. For accretion onto a black hole or nonmagnetic neutron star, where the system is relativistic, radiation shear stresses can contribute substantially to the total luminosity of the system. The spectral and temporal signatures of this form of heating are discussed, and those features which are unique to radiative dissipation are emphasized. The results are in broad agreement with the spectra of the nonmagnetic X-ray binary systems, including Cyg X-1.
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